InMemoryMessageRespository.java

/*
 * COMSAT
 * Copyright (c) 2013-2014, Parallel Universe Software Co. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 3.0
 * as published by the Free Software Foundation.
 */
/*
 * Based on the corresponding class in Spring Boot Samples.
 * Copyright the original author(s).
 * Released under the ASF 2.0 license.
 */
package comsat.sample.ui;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicLong;

public class InMemoryMessageRespository implements MessageRepository {

    private static AtomicLong counter = new AtomicLong();

    private final ConcurrentMap<Long, Message> messages = new ConcurrentHashMap<Long, Message>();

    @Override
    public Iterable<Message> findAll() {
        return this.messages.values();
    }

    @Override
    public Message save(Message message) {
        Long id = message.getId();
        if (id == null) {
            id = counter.incrementAndGet();
            message.setId(id);
        }
        this.messages.put(id, message);
        return message;
    }

    @Override
    public Message findMessage(Long id) {
        return this.messages.get(id);
    }
}